Rockies lock down Tulowitzki until 2020

Looking to provide stability with the core players, the Rockies finalized a contract extension with shortstop Troy Tulowitzki that ties him to the team through the 2020 season, major league sources confirmed to FOXSports.com. An official announcement will be made on Tuesday.

The 10-year deal is worth $157.75 million, including the $23.75 million that Tulowitzki already was guaranteed for 2011-13.

ESPN.com initially reported that the two sides were working on a 10-year contract.

The Rockies also are working on the details of a three-year deal to keep left-handed pitcher Jorge De La Rosa. That deal should be finalized shortly, allowing the Rockies to avoid losing De La Rosa as a free agent.

Tulowitzki signed a six-year contract, with an option, prior to the 2008 season. The new deal incorporates the final three guaranteed seasons of Tulowitzki's current contract -- $5.5 million in 2011, $8.25 million in 2012 and $10 million in 2013 -- and guarantees the $15 million option for 2014. It also adds six additional guaranteed seasons.

Tulowitzki assumed the leadership role on the Rockies during his rookie season of 2007, and has added to his stature in the last three seasons.

Terms of Tulowitzki's additional years were not announced, but the deal is not back loaded, according to sources. The Rockies want to avoid a heavy payoff in the final years. That became a problem with Todd Helton, whose original contract included a $19.1 million salary for 2011 with a $4.6 million buyout on a $23 million option for 2012.

To create payroll flexibility, the Rockies reworked Helton's deal prior to last season, giving him a $4.6 million signing bonus to for a revised deal that provides for $13.1 million of his $19.1 million 2011 salary to be deferred from 2014 through 2023 at 3 percent interest. It also added guaranteed salaries of $4.9 million in 2012 and $5 million in 2013.